#$%^&*AU2012261589B220141009.pdf#####ABSTRACT Provided are an insect pest-targeting gel composition causing neither leakage nor reaction of a volatile substance and capable of releasing the volatile substance at a constant rate; and a sustained release preparation comprising the insect pest-targeting gel composition. More specifically, provided is an insect pest-targeting gel composition comprising one or more volatile substances and an oil gelling agent, wherein the volatile substance is comprised in an amount of from 70.0 to 99.0% by weight by the insect pest-targeting gel composition. 1